diff --git a/sync/src/compact_block_builder.rs b/sync/src/compact_block_builder.rs
index e0a1f194..70ec0b49 100644
--- a/sync/src/compact_block_builder.rs
+++ b/sync/src/compact_block_builder.rs
@@ -61,3 +61,16 @@ fn short_transaction_id(nonce: u64, block_header: &BlockHeader, transaction_hash
 
 	siphash_transaction_hash_bytes[2..8].into()
 }
+
+#[cfg(test)]
+mod tests {
+	#[test]
+	fn short_transaction_id_is_correct() {
+		// TODO
+	}
+
+	#[test]
+	fn compact_block_is_built_correctly() {
+		// TODO
+	}	
+}
diff --git a/sync/src/synchronization_client.rs b/sync/src/synchronization_client.rs
index 7410c565..538c5713 100644
--- a/sync/src/synchronization_client.rs
+++ b/sync/src/synchronization_client.rs
@@ -2180,4 +2180,9 @@ pub mod tests {
 			Task::SendInventory(3, inventory, ServerTaskIndex::None),
 		]);
 	}
+
+	#[test]
+	fn relay_new_block_after_sendcmpct() {
+		// TODO
+	}
 }